'use strict';

/**@type {ModdedBattleScriptsData} */
let BattleScripts = {
	inherit: 'gen5',
	gen: 4,
	init() {
		for (let i in this.data.Pokedex) {
			delete this.data.Pokedex[i].abilities['H'];
		}
	},

	modifyDamage(baseDamage, pokemon, target, move, suppressMessages = false) {
		// DPP divides modifiers into several mathematically important stages
		// The modifiers run earlier than other generations are called with ModifyDamagePhase1 and ModifyDamagePhase2

		if (!move.type) move.type = '???';
		let type = move.type;

		// Burn
		if (pokemon.status === 'brn' && baseDamage && move.category === 'Physical' && !pokemon.hasAbility('guts')) {
			baseDamage = this.modify(baseDamage, 0.5);
		}

		// Other modifiers (Reflect/Light Screen/etc)
		baseDamage = this.runEvent('ModifyDamagePhase1', pokemon, target, move, baseDamage);

		// Double battle multi-hit
		if (move.spreadHit) {
			let spreadModifier = move.spreadModifier || 0.75;
			this.debug('Spread modifier: ' + spreadModifier);
			baseDamage = this.modify(baseDamage, spreadModifier);
		}

		// Weather
		baseDamage = this.runEvent('WeatherModifyDamage', pokemon, target, move, baseDamage);

		if (this.gen === 3 && move.category === 'Physical' && !Math.floor(baseDamage)) {
			baseDamage = 1;
		}

		baseDamage += 2;

		if (move.crit) {
			baseDamage = this.modify(baseDamage, move.critModifier || 2);
		}

		// Mod 2 (Damage is floored after all multipliers are in)
		baseDamage = Math.floor(this.runEvent('ModifyDamagePhase2', pokemon, target, move, baseDamage));

		// this is not a modifier
		baseDamage = this.randomizer(baseDamage);

		// STAB
		if (move.forceSTAB || type !== '???' && pokemon.hasType(type)) {
			// The "???" type never gets STAB
			// Not even if you Roost in Gen 4 and somehow manage to use
			// Struggle in the same turn.
			// (On second thought, it might be easier to get a Missingno.)
			baseDamage = this.modify(baseDamage, move.stab || 1.5);
		}
		// types
		move.typeMod = target.runEffectiveness(move);

		move.typeMod = this.clampIntRange(move.typeMod, -6, 6);
		if (move.typeMod > 0) {
			if (!suppressMessages) this.add('-supereffective', target);

			for (let i = 0; i < move.typeMod; i++) {
				baseDamage *= 2;
			}
		}
		if (move.typeMod < 0) {
			if (!suppressMessages) this.add('-resisted', target);

			for (let i = 0; i > move.typeMod; i--) {
				baseDamage = Math.floor(baseDamage / 2);
			}
		}

		if (move.crit && !suppressMessages) this.add('-crit', target);

		// Final modifier.
		baseDamage = this.runEvent('ModifyDamage', pokemon, target, move, baseDamage);

		if (!Math.floor(baseDamage)) {
			return 1;
		}

		return Math.floor(baseDamage);
	},
	tryMoveHit(target, pokemon, move) {
		this.setActiveMove(move, pokemon, target);

		let hitResult = this.singleEvent('PrepareHit', move, {}, target, pokemon, move);
		if (!hitResult) {
			if (hitResult === false) {
				this.add('-fail', pokemon);
				this.attrLastMove('[still]');
			}
			return false;
		}
		this.runEvent('PrepareHit', pokemon, target, move);

		if (!this.singleEvent('Try', move, null, pokemon, target, move)) {
			return false;
		}

		if (move.target === 'all' || move.target === 'foeSide' || move.target === 'allySide' || move.target === 'allyTeam') {
			if (move.target === 'all') {
				hitResult = this.runEvent('TryHitField', target, pokemon, move);
			} else {
				hitResult = this.runEvent('TryHitSide', target, pokemon, move);
			}
			if (!hitResult) {
				if (hitResult === false) {
					this.add('-fail', pokemon);
					this.attrLastMove('[still]');
				}
				return false;
			}
			return this.moveHit(target, pokemon, move);
		}

		hitResult = this.runEvent('TryImmunity', target, pokemon, move);
		if (!hitResult) {
			if (!move.spreadHit) this.attrLastMove('[miss]');
			this.add('-miss', pokemon, target);
			return false;
		}

		if (move.ignoreImmunity === undefined) {
			move.ignoreImmunity = (move.category === 'Status');
		}

		if ((!move.ignoreImmunity || (move.ignoreImmunity !== true && !move.ignoreImmunity[move.type])) && !target.runImmunity(move.type, true)) {
			return false;
		}

		let boostTable = [1, 4 / 3, 5 / 3, 2, 7 / 3, 8 / 3, 3];

		// calculate true accuracy
		/**@type {number | true} */
		let accuracy = move.accuracy;
		let boosts, boost;
		if (accuracy !== true) {
			if (!move.ignoreAccuracy) {
				boosts = this.runEvent('ModifyBoost', pokemon, null, null, Object.assign({}, pokemon.boosts));
				boost = this.clampIntRange(boosts['accuracy'], -6, 6);
				if (boost > 0) {
					accuracy *= boostTable[boost];
				} else {
					accuracy /= boostTable[-boost];
				}
			}
			if (!move.ignoreEvasion) {
				boosts = this.runEvent('ModifyBoost', target, null, null, Object.assign({}, target.boosts));
				boost = this.clampIntRange(boosts['evasion'], -6, 6);
				if (boost > 0) {
					accuracy /= boostTable[boost];
				} else if (boost < 0) {
					accuracy *= boostTable[-boost];
				}
			}
		}
		if (move.ohko) { // bypasses accuracy modifiers
			if (!target.isSemiInvulnerable()) {
				accuracy = 30;
				if (pokemon.level >= target.level && (move.ohko === true || !target.hasType(move.ohko))) {
					accuracy += (pokemon.level - target.level);
				} else {
					this.add('-immune', target, '[ohko]');
					return false;
				}
			}
		} else {
			accuracy = this.runEvent('ModifyAccuracy', target, pokemon, move, accuracy);
		}
		if (move.alwaysHit) {
			accuracy = true; // bypasses ohko accuracy modifiers
		} else {
			accuracy = this.runEvent('Accuracy', target, pokemon, move, accuracy);
		}
		if (accuracy !== true && !this.randomChance(accuracy, 100)) {
			if (!move.spreadHit) this.attrLastMove('[miss]');
			this.add('-miss', pokemon, target);
			return false;
		}
		hitResult = this.runEvent('TryHit', target, pokemon, move);
		if (!hitResult) {
			if (hitResult === false) {
				this.add('-fail', pokemon);
				this.attrLastMove('[still]');
			}
			return false;
		}

		if (move.breaksProtect && target.removeVolatile('protect')) {
			if (move.id === 'feint') {
				this.add('-activate', target, 'move: Feint');
			} else {
				this.add('-activate', target, 'move: ' + move.name, '[broken]');
			}
		}

		move.totalDamage = 0;
		/** @type {number | undefined | false} */
		let damage = 0;
		pokemon.lastDamage = 0;
		if (move.multihit) {
			let hits = move.multihit;
			if (Array.isArray(hits)) {
				// yes, it's hardcoded... meh
				if (hits[0] === 2 && hits[1] === 5) {
					hits = this.sample([2, 2, 2, 3, 3, 3, 4, 5]);
				} else {
					hits = this.random(hits[0], hits[1] + 1);
				}
			}
			hits = Math.floor(hits);
			let nullDamage = true;
			/** @type {number | undefined | false} */
			let moveDamage;
			// There is no need to recursively check the ´sleepUsable´ flag as Sleep Talk can only be used while asleep.
			let isSleepUsable = move.sleepUsable || this.getMove(move.sourceEffect).sleepUsable;
			let i;
			for (i = 0; i < hits && target.hp && pokemon.hp; i++) {
				if (pokemon.status === 'slp' && !isSleepUsable) break;
				move.hit = i + 1;

				if (move.multiaccuracy && i > 0) {
					accuracy = move.accuracy;
					if (accuracy !== true) {
						if (!move.ignoreAccuracy) {
							boosts = this.runEvent('ModifyBoost', pokemon, null, null, Object.assign({}, pokemon.boosts));
							boost = this.clampIntRange(boosts['accuracy'], -6, 6);
							if (boost > 0) {
								accuracy *= boostTable[boost];
							} else {
								accuracy /= boostTable[-boost];
							}
						}
						if (!move.ignoreEvasion) {
							boosts = this.runEvent('ModifyBoost', target, null, null, Object.assign({}, target.boosts));
							boost = this.clampIntRange(boosts['evasion'], -6, 6);
							if (boost > 0) {
								accuracy /= boostTable[boost];
							} else if (boost < 0) {
								accuracy *= boostTable[-boost];
							}
						}
					}
					accuracy = this.runEvent('ModifyAccuracy', target, pokemon, move, accuracy);
					if (!move.alwaysHit) {
						accuracy = this.runEvent('Accuracy', target, pokemon, move, accuracy);
						if (accuracy !== true && !this.randomChance(accuracy, 100)) break;
					}
				}

				moveDamage = this.moveHit(target, pokemon, move);
				if (moveDamage === false) break;
				if (nullDamage && (moveDamage || moveDamage === 0 || moveDamage === undefined)) nullDamage = false;
				// Damage from each hit is individually counted for the
				// purposes of Counter, Metal Burst, and Mirror Coat.
				damage = (moveDamage || 0);
				move.totalDamage += damage;
				this.eachEvent('Update');
			}
			if (i === 0) return false;
			if (nullDamage) damage = false;
			this.add('-hitcount', target, i);
		} else {
			damage = this.moveHit(target, pokemon, move);
			move.totalDamage = damage;
		}

		if (move.recoil && move.totalDamage) {
			this.damage(this.calcRecoilDamage(move.totalDamage, move), pokemon, target, 'recoil');
		}

		if (move.struggleRecoil) {
			this.directDamage(this.clampIntRange(Math.round(pokemon.maxhp / 4), 1), pokemon, pokemon, /** @type {Effect} */ ({id: 'strugglerecoil'}));
		}

		if (target && pokemon !== target) target.gotAttacked(move, damage, pokemon);

		if (move.ohko) this.add('-ohko');

		if (!damage && damage !== 0) return damage;

		this.eachEvent('Update');

		if (target && !move.negateSecondary) {
			this.singleEvent('AfterMoveSecondary', move, null, target, pokemon, move);
			this.runEvent('AfterMoveSecondary', target, pokemon, move);
		}

		return damage;
	},

	calcRecoilDamage(damageDealt, move) {
		// @ts-ignore
		return this.clampIntRange(Math.floor(damageDealt * move.recoil[0] / move.recoil[1]), 1);
	},
};

exports.BattleScripts = BattleScripts;